Science Chapter 6

Flashcard maker : Lily Taylor
A compound dossiers from a mixture because it
Is held together by chemical bonds
Which compound is formed from a right network of oppositely charged ions
Salt
Often atoms join so that each atom will have
An outermost energy level that is full of electrons
The bonds that hold atoms together behave most like
Flexible springs
An ionic bond is a bond that forms between
Ions with opposite charges
In which type of bond do atoms share electrons
Covalent bonds
The anion formed from an oxygen atom is called a
Oxide ion
The name for the compound with the formula Cr2O3 would be written as
Chromium (II) oxide
A carbon atom can bond to four other atoms because it has
Four valence electrons
Alcohols are organic compounds that contain
Carbon, oxygen, and hydrogen
Which compounds have carbon carbon double bonds
Alkenes
The rings of the DNA ladder are made up of
Paired monomers
Some polymers are elastic because they are made of
Tangled chains
What is an example of a compound
Salt
Atoms and ions are held together by
Chemical bonds
Which of the following models could be used to compare the sizes of atoms in a molecule
Space filling
There are strong bonds between the atoms on a piece of quartz. These bonds give quartz a
High melting point
The attraction between molecules tends to be ____ the attraction between ions
Weaker than
Which molecules are most strongly attracted to one another
Water molecules
Sugar has a lower melting point than salt because sugar is made of
Molecules
A hudrogen bond between water molecules is which of the following when compared with the bonds within an individual water molecule
It is weaker
A compound with only two atoms would not have a
Bond angle
Which of the following models would show the bond angle
Ball and stick
Atoms sometimes form bonds to
Become more stable
Copper atoms are held together by ____ bonds
Metallic
Oxygen atoms have sex electrons in their outer shells. When two oxygen atoms bond, they will form a ____ bond by ____ their electrons
Covalent, sharing
An ionic compound of calcium and chlorine would be names
Calcium chloride
A covalent compound made of copper and oxygen would be naked
Copper (II) oxide
The covalent compound N2O5 would be named
Dinitrogen pentoxide
The chemical formula for an ionic compound of potassium and oxygen is
k2O
The _____ formula of a compound is written in the simplest whole number ratio of atoms
Empirical
The formal C6H12O6 would be the ____ formula for glucose
Chemical and molecular
All organic compounds must contain the element
Carbon
The atoms in organic molecules are held together by _____ bonds
Covalent o
The atoms of propane are held together by ____ bonds
Single
Ethene differs from ethane in that is has
Double bond
An alcohol must contain a
-OH group
A _____ is a polymer that contains many different molecules of amino acids
Glucose
A polymer or sugar molecules is called a
Carbohydrate
A compound is held together by
Chemical bonds
In which substance do the molecules have the strongest attractions to one another
Sugar and a solid
In a metallic bond, the nucleus of one atom is attracted by a nearby atoms
Electron
The simplest organic compound is
Methane
Polymers are large organic molecules that are made of
Repeating units
The forces that hold different atoms or ions together are
Chemical bonds
Each molecule of table sugar contains
12 atoms of carbon
Gases take up a lot of space because gas molecules
Are not attracted to one another
Covalent bonds are formed between
Non metal atoms
Copper is a good conductor of electricity because its electrons
Can move from atom to atom
The name Dinitrogen tetrioxide tells you that this compound contains
2 nitrogen and 4 oxygen atoms
It do possible for different covalent compounds to have the same empirical formula because empirical formulas represent
A total of all ionic bonds
Alkanes are hydrocarbons that contain
Carbon, hydrogen, and oxygen

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